Height adjustable desk



FIG. 1 is a perspective view of a height adjustable desk in a collapsed position, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a rear side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a perspective view of a height adjustable desk in an extended position;

FIG. 9 is a front view thereof;

FIG. 10 is a rear side view thereof;

FIG. 11 is a left side view thereof; and,

FIG. 12 is a right side view thereof. 

CLAIM I claim the ornamental design for a height adjustable desk, as shown and described. 